lamina externs

例句：

1. 1. The plant's lamina externs are responsible for protecting the plant from environmental damage.
   植物的外层膜负责保护植物免受环境损害。
2. 2.The scientist studied the lamina externs of the butterfly to understand its behavior.
   科学家研究了蝴蝶的外层膜以了解其行为。
3. 3.The researchers found that the lamina externs of the flower were essential for pollination.
   研究人员发现，花的外层膜对于传粉至关重要。